Diego, the NT word translated "tribe" is the Greek "phule" #5443 in Strong's Concordance.
Nowhere in any translation that I am aware of is "ethnos" in that verse or any other translated as "tribes". For example Mt 24:9 reads "and ye shall be hated of all nations [ethnos] for my names sake."
Whenever the writers of the NT were referring to the "tribes" of Israel, they used "phule" not "ethnos".
You are absolutely correct. Phule is the word translated "tribe" in the Greek in all cases.
Nowhere in any translation that I am aware of is "ethnos" in that verse or any other translated as "tribes". For example Mt 24:9 reads "and ye shall be hated of all nations [ethnos] for my names sake."
Well...you may be right here also....but we cannot be certain as Matthew was written in the Hebrew....and no original exists. It was later translated into the Greek.
The one thing we can be sure of is that "ETHNOS" also means tribes in the Greek.....and why it was translated "ETHNOS" instead of "PHULE" remains a question.